Door-bell



(NO Mod I H. 0. WILLIAMS,

DOORBELL.

Nd. 438,789. Patented 001;. 21, 1.890.

illillll! g lrllmlll NITED TATES PATENT OFFICE.

HENRY C. WVILLIAMS, OF NEW BRITAIN, CONNECTICUT.

DOOR-BELL.

SPECIFICATION forming part of Letters Patent No. 438,789, dated October21, 1890.

Application filed May 2, 1890- Serial No. 350,316. (No model.)

To all whom it may concern.-

Be it known that I, HENRY O. WILLIAMS, a citizen of the United States,residing at New Britain, in the county of Hartford and State ofConnecticut, have invented certain new an d useful Improvements inDoor-Bells, of which the following is a specification.

My invention relates to improvements in door-bells of the class havingahammer-actuating train; and the objects of my improvement aresimplicity and economy in construction, efficienoy in operation, and tomore conveniently arrange the parts connected with the push-button oroperating device on the outside of the door.

In the accompanying drawings, Figure 1 is a front elevation of mydoor-bell with the gong and front plate removed, a portion ofthe-escapement-wheel being broken away in order to better'illustrateother parts. Fig. 2 is a vertical section on the line a; x of Fig. l ofthe push-button escutcheon, a portion of a door, the movement plates,and gong, the other parts being shown in side elevation; and Fig. 3 is adetached port-ion, showing the tripping mechanism.

A designates the base-plate, having a central opening that is covered bythe bridge 4 and provided With lugs 5 5, having screw-holes tofacilitate fastening the said base-plate to the door B or other suitablesupport. Said baseplate is also provided with a lug 6, in which to pivotthe trip-lever 7. Parallel to the baseplate A is the companion movementplate C, Fig. 2, which is held in proper position relatively to thebase-plate A by the pillars or posts 8 8 8, Fig. 1,as inordinaryalarm-movements. The plate C is also provided with a centralboss 9, upon which the gong D is stationarily affixed.

1O designates the main shaft, having one of its bearings in the centralboss 9 of the plate C and its other bearing in the bridge4 of thebase-plate A. Said shaft is provided with the gear-wheel 11, spring 12,ratchet 13, and pawl 14, all arranged inthe usual manner for the mainshaft of spring-actuated movements.

15 designates the escapement-shaft, which has its journal-bearings inthe platesA C, and is provided with a pinion 16, that meshes into and isdriven by the gear-wheel 11, and an escapement-wheel17, that engages thepallets 18 and 19 on the hammer-shaft 20, which shaft is also journaledin the movement plates and carries the hammer 21 for striking the gongas the wheels are actuated by the spring in the ordinary manner foralarm-movements.

In order to trip the alarm-movement for sounding the gong for a giventime or approximately a given number of strokes and then stopping it, Iprovide the trip-lever 7 and arrange its stop end 24 so as to engageaprojection 22 or projections upon the escapement-shaft 15. The lever 7is provided with a spring 23, which, engagingthe inside of the bridge 4,holds the lever in the position represented in Fig. 2, and the pin 22 isso set in the escapement-shaft 15 as to be in the same plane as the stopend 24 of the lever 7 when the lever is in this position.

iVhile I have represented only one pin or projection 22 on the shaft 15,other like projections may be added, if desired, as one other projectionis indicated by broken lines at the right-hand side of the shaft 15 inFig. 8.

Upon the outside of the door B or other place of attachment for the bellI arrange the push-button 25 and its escutcheon E or other equivalentdevice for tripping the lever 7. The shank 26 of the push-button extendsthrough the door and rests upon the lever 7 opposite the bridge 4 of thebase-plate and preferably in axial alignment with the bell, the innerend of said lever being in the form of a broad plate-like device. Thepush-button is also provided with a spring 27 to assist in returning itinto the position shown; but said spring is not essential, as the spring23 may be made strong enough to return the push-button when it returnsthe lever 7 to its normal position.

By depressing the push-button 25 the lever 7 is depressed so as towithdraw its stop end 24 out of the path of the pin 22 in the revolvin gshaft 15, thereby releasing the alarm mechanism and allowing the bell tobe sounded. The push-button'maybeimmediately released, and the leverwill return to its normal position and stop the alarm mechanism as soonas the escapelnent-shaft has completed one revolution and the pin 22again comes in contact with the stop end 24 of the lever 7. If,

however, two pins instead of one are employed then the bell Will bestopped When the escapement-shaft has made only one-half of arevolution. By thus arranging the pins or projec- 5 tions upon theescapement-shai't at given distances apart and in the plane of the stopend 2-1 of the lever 7 said lever can be easily disengaged and the bellwill be sounded approximately a given number of strokes every time tothat the push-button is depressed, no matter how quickly saidpush-button may be released after its depression, thereby insuring asufficiently prolonged call. The opening inside the bridge may be largeenough to admit a lever of considerable width with a broad surface,against Which the shank of the pushbutton may be applied, and thelocation of the bell with reference to the push-button may be varied toa considerable extent, whereby the application of the bell to a properposition is very simple and convenient. This feature of my invention maybe embodied in bells whose holding and ringing mechanism beyond thepush-rod and broad plate-like end 2 5 of the lever, against which saidrod bears, are of a different construction from that herein shown. I amalso enabled to arrange the external operating device centrally withreferen cc to the bell, whereby the bell upon one side of the door andthe push-button upon the other may be symmetrically arranged.

I claim as my invention 1. The combination of gong D, the hammeractuating train, a projection 22 on the escapement-shaft of saidtrain, the spring-pressed lever '7, having a stop end 24 in the path ofsaid projection when said lever is in its normal position, and apush-rodfor acting on said lever, substantially as described, and for thepurpose specified.

2. The combination of the base-plate A, having central opening andbridge 4, the main shaft 10, bearing the main Wheel 11 and having thebearing for one end in said bridge, the shaft 15, bearing the pinion 16and projection 22 and having the bearing for one end in said base-platein a different plane from that of said bridge, the trip-lever 7, andmeans for operating said lever, substantially as described, and for thepurpose specified.

HENRY C. WILLIAMS. Vitnesses:

J AMES SHEPARD, J OHN EDWARDS, Jr.

